Hi
Good info above.
At times I think that it was only Henry and myself that could successfully seam seal the earlier Rainbows...

Henry has re-designed the cross strut of the DR so now it is very easy to seam seal . See this link :
http://www.tarptent.com/doublerainbow2010.html
As for the set up , I have not timed myself but I definitely can do the DR in less than two minutes, so
not a big deal there. It's all about technique and practice.
As far as space it depends on how tall you are. A 6'2"/3" will fit inside the DR , for me at 5'7" have about 25% of the floor length
to spread my stuff on...

A quick video of the DR :
http://www.youtube.com/watch?v=Gv8Mxbpc1ac

I went downstairs , set the tent up and shot the video in under 15 minutes. It was almost lunchtime...
Franco
franco at tarptent dot com